13213503 has 8 divisors (see below), whose sum is σ = 19575600. Its totient is φ = 8808984.

The previous prime is 13213481. The next prime is 13213507. The reversal of 13213503 is 30531231.

It is not a de Polignac number, because 13213503 - 2¹⁸ = 12951359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244668 + ... + 244721.

It is an arithmetic number, because the mean of its divisors is an integer number (2446950).

Almost surely, 2^13213503 is an apocalyptic number.

13213503 is a deficient number, since it is larger than the sum of its proper divisors (6362097).

13213503 is an equidigital number, since it uses as much as digits as its factorization.

13213503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489398 (or 489392 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 13213503 is about 3635.0382391386. The cubic root of 13213503 is about 236.4137086539.

Adding to 13213503 its reverse (30531231), we get a palindrome (43744734).

The spelling of 13213503 in words is "thirteen million, two hundred thirteen thousand, five hundred three".